Open Access
Table A.1.
Details of the HST UV observations.
| Property | MBO2 | MBO3 | DI1388 |
| RA [deg] | 32.97933 | 33.02008 | 44.29958 |
| DEC [deg] | -74.21028 | -74.19933 | -72.88194 |
| Spectral type | O9V | O9.5V | B0 |
| Grating | COS/G160M | COS/G160M | STIS/E140M |
| λ[Å] | 1418-1789 | 1418-1789 | 1140-1735 |
| R | 19000 | 19000 | 45800 |
| Exposure [s] | 1220 | 1200 | 26160 |
| S/N | 15-35 | 15-35 | 10-25 |
Notes. The names and classifications of the stars are adopted from Ramachandran et al. (2021).
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